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Imogolite, an aluminosilicate with thread-like morphology and a nano-size tubular tunnel, is a unique clay mineral not only in morphology but also in colloidal stability. This clay is normally contained in volcanic ash soil and important in characterizing the physical and chemical properties of volcanic ash soil. In the present study, we performed measurements of acid–base potentiometric titration,...
The viscosity of a suspension of sodium montmorillonite (at pH 10) was measured using a capillary viscometer as a function of electrolyte (NaCl) concentration. The concentration of clay was made sufficiently low so that the effective volume fraction could be analysed on the basis of viscosity equations. The solvent condition was maintained in an alkaline condition such that the electrostatic attraction...
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